The phrase 'delay in sending' is grammatically correct and can be used in written English.
You can use it to refer to a delay or postponement in the process of sending something out. For example, "The delay in sending the shipment caused serious problems for our customers."
I gather that there was a regrettable delay in sending out the annual consolation prizes.
"My son was a lion," he said, discussing the delay in sending rescuers.
American diplomats at the United Nations expressed frustration at the delay in sending experts to assess the prospects for elections.
The governor took advantage of a rare circumstance, created by the Legislature's long delay in sending him the bills, that gave him such a pocket veto.
The military's delay in sending a public signal reflected these close ties and competing concerns, said Carlos Tapia, a former lecturer at the Army Intelligence School.
Among other findings, it determined that there was no delay in sending a CIA rescue team, and no missed opportunity for a military rescue.
For two weeks, he said, the callers offered excuses for delays in sending him the $16 million.
These can lead to significant delays in sending e-transfers and a loss of confidence in the financial institution.
Former IRA officials have already admitted there were delays in sending the warnings because local telephone boxes had been vandalised.
Mr. Houlihan and Mr. Berrios are feuding over a variety of matters, accusing each other of being responsible for delays in sending out tax bills.
Earlier this week, when a 5.8-magnitude earthquake shook the East Coast, many people reported difficulty making calls and delays in sending and receiving text messages.
